Mega Code Archive

 

Categories / C# / 2D Graphics

 

Using the mouse to draw on a form

using System;    using System.Drawing;    using System.ComponentModel;    using System.Windows.Forms;    public class Painter : System.Windows.Forms.Form    {       bool shouldPaint = false;       public Painter()       {          this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);          this.ClientSize = new System.Drawing.Size(400, 400);          this.MouseDown +=new System.Windows.Forms.MouseEventHandler(this.Painter_MouseDown );          this.MouseUp +=new System.Windows.Forms.MouseEventHandler(this.Painter_MouseUp );          this.MouseMove +=new System.Windows.Forms.MouseEventHandler(this.Painter_MouseMove );       }              [STAThread]       static void Main()        {          Application.Run( new Painter() );       }       private void Painter_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e )       {          shouldPaint = true;       }       private void Painter_MouseUp(object sender, System.Windows.Forms.MouseEventArgs e )       {          shouldPaint = false;       }       protected void Painter_MouseMove(object sender, System.Windows.Forms.MouseEventArgs e )       {          if ( shouldPaint )          {             Graphics graphics = CreateGraphics();             graphics.FillEllipse(new SolidBrush( Color.Black ),e.X, e.Y, 10, 10 );          }       }    }